OP-II-3

PP-I-59calculated. During the aromatization of low alkanes the gaseous and liquid productswere formed. Gas-chromatographic analysis has been demonstrated the presence ofhydrogen, methane, alkanes and alkenes С 2 -С 4 in gases. The liquid products arepresented by benzene and alkylbenzenes С 7 -С 9 , naphthalene and metylnaphtalenes.The table gives the results of kinetic study, obtained during the aromatization ofnatural gas components at the temperature of 700 °С.Table Content of the products of natural gas conversion over 0.5% Ga-4.0% Мо/ZSM-5catalyst at different contact timeProducts yield (wt %)Contact time (s)0.7 0.9 1.8 3.6Hydrogen 2.09 2.18 2.48 2.86Alkanes 84.03 83.64 82.25 80.26Alkenes 4.76 4.39 3.30 2.33Benzene 7.74 7.99 9.92 11.86Toluene 0.48 0.51 0.43 0.33Naphthalene 0.87 1.25 1.56 2.31Methyl- и dimethylnaphthalenes 0.03 0.04 0.06 0.05Conversion of natural gas, % 16.0 16.4 17.8 19.7Selectivity for aromatic hydrocarbons, % 57.0 59.7 67.2 73.9The increase in the degree of conversion of initial feedstock components with theincreasing contact time is observed. The yield of benzene and naphthalene in liquidreaction products increases, the content of toluene reaches a maximum. Bysecondary conversions the rate of toluene consumption surpasses the rate of itsformation with the increasing contact time. The primacy of olefin hydrocarbonsformation is testified by the decrease in yield of these intermediate products with theincreasing contact time. The further transformations of olefin hydrocarbons result inthe formation of aromatic hydrocarbons. With the increasing contact time theconcentration of hydrogen, presented in reaction products also increases, whichindicates that the reactions of dehydration of initial alkanes and dehydrocyclization ofthe formed olefins over modified pentacyl are intensive.Thus, the experimental findings of investigation of conversion of natural gas into0.5% Ga-4.0%Mo/ZSM-5 aromatic hydrocarbons allow developing a kinetic model ofthe process, to evaluate the influence of kinetic parameters, and to create amathematic model of reactor block.AcknowledgementsThe work was supported by grant of the Program Presidium of RAS (grant № 27.50).325